1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f4d19be3aa837931d427d152e81e745e880addf847b2781d179c5bbed7cfb8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/440d0205-a305-42ff-a269-430b3a61f8fd.json and https://artists.proofprofile.net/proofs/artist/440d0205-a305-42ff-a269-430b3a61f8fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cb9b0f12282cb5e7486711126d526ce2bdae56bee24fb1f36352864144f02d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/01jBLs7IZQzPt3dVdn5rDa.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/01jBLs7IZQzPt3dVdn5rDa.
{"copyright_id":"0x78a9edeed11dcd16f560f3f34db3ae324cc9b49947f8b240cec02a5060b2bf30","isrc":"GBANP9400071","name":"Blue Monday '88","registered_at":"2026-06-01T09:45:11Z","spotify_id":"31MOjWj3CT3dCQsMV2b8Wu","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9edeed11dcd16f560f3f34db3ae324cc9b49947f8b240cec02a5060b2bf30. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/31MOjWj3CT3dCQsMV2b8Wu.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/31MOjWj3CT3dCQsMV2b8Wu.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dcdf1b1961386961759092839deb57fe81c885eb5b11ca9ff28ab24028e039. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1nMPAoLnWTBuxH4G5236Ip.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1nMPAoLnWTBuxH4G5236Ip.
{"copyright_id":"0x543f34fa3829b7a2f4fa844edb4bf042bbbe0b6825ef3c3fc2e1061c80ab3994","isrc":"GBAAP0001115","name":"Blue Monday","registered_at":"2026-06-01T05:53:44Z","spotify_id":"6hHc7Pks7wtBIW8Z6A0iFq","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543f34fa3829b7a2f4fa844edb4bf042bbbe0b6825ef3c3fc2e1061c80ab3994. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/6hHc7Pks7wtBIW8Z6A0iFq.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/6hHc7Pks7wtBIW8Z6A0iFq.
{"copyright_id":"0x78a9edeed11dcd16f560f3f34db3ae324cc9b49947f8b240cec02a5060b2bf30","isrc":"GBANP9400071","name":"Blue Monday '88","registered_at":"2026-06-01T09:45:10Z","spotify_id":"45ffNfz584muufBHc3Ssxs","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9edeed11dcd16f560f3f34db3ae324cc9b49947f8b240cec02a5060b2bf30. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/45ffNfz584muufBHc3Ssxs.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/45ffNfz584muufBHc3Ssxs.
{"copyright_id":"0x15f6c01a9f8b4d51b8cbc1599b79fe894677dc907338470db49f3cef54381d3e","isrc":"GBAAP1500383","name":"Your Silent Face","registered_at":"2026-06-24T08:53:48Z","spotify_id":"4Z4dyIOoMTM53HBfGgbIXZ","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f6c01a9f8b4d51b8cbc1599b79fe894677dc907338470db49f3cef54381d3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4Z4dyIOoMTM53HBfGgbIXZ.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4Z4dyIOoMTM53HBfGgbIXZ.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5d41235391160f5e1993c6efc06d4dfe26cb5d51c3855b97daafc787a24ae. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/33Dg8ia17NGIM5zG2QGQRy.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/33Dg8ia17NGIM5zG2QGQRy.
80s HITS – 100 Greatest Songs of the 1980s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69649f9dbbea3900f64a6089877bb6c1562f6892b94d8b5ff4e443b3961eac56. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/5aGEKPrq34s6YUC4ljNUNy.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/5aGEKPrq34s6YUC4ljNUNy.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69649f9dbbea3900f64a6089877bb6c1562f6892b94d8b5ff4e443b3961eac56. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/17ZirTno32wJKfNi88zGFn.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/17ZirTno32wJKfNi88zGFn.
{"copyright_id":"0x78a9edeed11dcd16f560f3f34db3ae324cc9b49947f8b240cec02a5060b2bf30","isrc":"GBANP9400071","name":"Blue Monday '88","registered_at":"2026-06-01T09:45:11Z","spotify_id":"2PeF8ZxDZzCs1yBuev47GU","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9edeed11dcd16f560f3f34db3ae324cc9b49947f8b240cec02a5060b2bf30. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2PeF8ZxDZzCs1yBuev47GU.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2PeF8ZxDZzCs1yBuev47GU.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb40857597195485ae297af8df0f8a019f9ec86a389c56a3d823f166988a396. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/2RzN3FCpHUPXkK7a6niHq1.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/2RzN3FCpHUPXkK7a6niHq1.
{"copyright_id":"0xd2e5d41235391160f5e1993c6efc06d4dfe26cb5d51c3855b97daafc787a24ae","isrc":"GBAAP1500066","name":"Blue Monday","registered_at":"2026-06-20T05:24:54Z","spotify_id":"27iDtahkQ23BsLopuE4dBp","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5d41235391160f5e1993c6efc06d4dfe26cb5d51c3855b97daafc787a24ae. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/27iDtahkQ23BsLopuE4dBp.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/27iDtahkQ23BsLopuE4dBp.
{"copyright_id":"0xd2e5d41235391160f5e1993c6efc06d4dfe26cb5d51c3855b97daafc787a24ae","isrc":"GBAAP1500066","name":"Blue Monday","registered_at":"2026-06-20T05:24:54Z","spotify_id":"4ye7dmg8XGHhxFwu1xY3xw","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5d41235391160f5e1993c6efc06d4dfe26cb5d51c3855b97daafc787a24ae. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4ye7dmg8XGHhxFwu1xY3xw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4ye7dmg8XGHhxFwu1xY3xw.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69649f9dbbea3900f64a6089877bb6c1562f6892b94d8b5ff4e443b3961eac56. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1fNTJDOzxzYkv8DBTVeEXK.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1fNTJDOzxzYkv8DBTVeEXK.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9edeed11dcd16f560f3f34db3ae324cc9b49947f8b240cec02a5060b2bf30. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4cZ1hH3E06uAytP9k5xMp7.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4cZ1hH3E06uAytP9k5xMp7.
{"copyright_id":"0xd2e5d41235391160f5e1993c6efc06d4dfe26cb5d51c3855b97daafc787a24ae","isrc":"GBAAP1500066","name":"Blue Monday - 2016 Remaster","registered_at":"2026-06-20T05:24:54Z","spotify_id":"7dDPmBrXvtXu7wnoYYDF2m","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e5d41235391160f5e1993c6efc06d4dfe26cb5d51c3855b97daafc787a24ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7dDPmBrXvtXu7wnoYYDF2m.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7dDPmBrXvtXu7wnoYYDF2m.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb40857597195485ae297af8df0f8a019f9ec86a389c56a3d823f166988a396. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1XS43MnhTSiG62Dq0p6HCw.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1XS43MnhTSiG62Dq0p6HCw.